15540738921

Names of 15540738921

• Cardinal: 15540738921 can be written as Fifteen billion, five hundred forty million, seven hundred thirty-eight thousand, nine hundred twenty-one.

Scientific notation

• Scientific notation: 1.5540738921 × 10¹⁰

Factors of 15540738921

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 493

Divisors of 15540738921

• Number of divisors d(n): 96
• Complete list of divisors:
  1 3 9 17 27 29 51 87 127 153 261 317 381 459 493 783 841 951 1143 1479 2159 2523 2853 3429 3683 4437 5389 6477 7569 8559 9193 11049 13311 14297 16167 19431 22707 27579 33147 40259 42891 48501 58293 62611 82737 99441 106807 120777 128673 145503 156281 187833 248211 266597 320421 362331 386019 468843 563499 684403 799791 961263 1086993 1167511 1406529 1690497 1815719 2053209 2399373 2883789 3502533 4219587 4532149 5447157 6159627 7198119 10507599 13596447 16341471 18478881 19847687 31522797 33857819 40789341 49024413 59543061 101573457 122368023 178629183 304720371 535887549 575582923 914161113 1726748769 5180246307 15540738921
• Sum of all divisors σ(n): 25526292480
• Sum of proper divisors (its aliquot sum) s(n): 9985553559
• 15540738921 is a deficient number, because the sum of its proper divisors (9985553559) is less than itself. Its deficiency is 5555185362

Bases of 15540738921

• Binary: 1110011110010011001101101101101001₂
• Hexadecimal: 0x39E4CDB69
• Base-36: 750JYW9

Squares and roots of 15540738921

• 15540738921 squared (15540738921²) is 241514566210684244241
• 15540738921 cubed (15540738921³) is 3753314819098812120517578803961
• The square root of 15540738921 is 124662.5000591597
• The cube root of 15540738921 is 2495.4979733557

Scales and comparisons

• 15,540,738,921 seconds is equal to 494 years, 7 weeks, 4 days, 15 hours, 55 minutes, 21 seconds.
• To count from 1 to 15,540,738,921 would take you about nine hundred eighty-eight years!

  This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 15540738921 cubic inches would be around 208 feet tall.

Recreational maths with 15540738921

• 15540738921 backwards is 12983704551
• The number of decimal digits it has is: 11
• The sum of 15540738921's digits is 45
• More coming soon!